ICD-10 Code H16.123 – Filamentary keratitis, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.123 – Filamentary keratitis, bilateral
What it is
H16.123 identifies filamentary keratitis affecting both eyes. This corneal condition involves strands of mucus and epithelial debris attached to the eye surface.
Clinical signs
Common findings include eye irritation, foreign-body sensation, tearing, and photophobia. Clinical features vary; refer to documentation for bilateral corneal filaments and associated surface inflammation.
When to use this code
Use H16.123 when the provider documents filamentary keratitis in both eyes. It is appropriate when bilateral corneal filaments are confirmed on exam or clearly stated in the assessment. Check documentation if laterality is unclear or only one eye is involved.
Do not use for
Do not use this code for unilateral filamentary keratitis or for nonspecific dry eye without documented filaments. Check documentation if the record describes another corneal disorder instead.
Coding tip
Confirm bilateral involvement in the note before assigning H16.123.